Journal
CHEMICAL ENGINEERING & TECHNOLOGY
Volume 40, Issue 3, Pages 522-528Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ceat.201500330
Keywords
Adsorbents; Calcium compounds; Calcium looping; Carbon dioxide capture; Doping
Categories
Funding
- National Natural Science Foundation of China [51606076]
- Foundation of State Key Laboratory of Coal Combustion [FSKLCCB1705]
- Analytical and Testing Center of HUST
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The calcium-looping process for post-combustion carbon dioxide capture, an economically and technically feasible method suitable for large-scale use, has recently gained much attention. However, the capture capacity of calcium-based sorbents rapidly decreases after only a few cycles. Herein, calcium-based sorbents with enhanced cyclic CO2-capture capacity have been derived from cheap, natural raw materials by using a simple impregnation method. Limestone and shells were used as the calcium-based raw materials, with sea salt as dopant. Modified limestone had the highest CO2-capture capacity after multiple carbonation-calcination cycles. Sea-salt-doped sorbent showed a relatively stable porous surface during cycles, which resulted in a higher CO2-capture capacity.
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